Mine car compressor



Aug. 18, 1931. F. D. HOLDSWORTH 1,819,710

' MINE CAR COMPRESSOR Filed Sept. 19, 1928 2 Sheets-Sheet l MINE CAR COMPRESSOR Filed Sept. 19. 1928 2 Sheets-Sheet 2 1 Annie 4-W- Patented Aug. 18, 1931 UNITED. srrns PATENT; emu:

FRED D. HOLDSWORTH, OF CLAREMONT, I-IAMLPSIEIIIitIil, ASSIGNOR TO SULLIVAN MACHINERY COMPANY, A CORPORATION OF MfASSAGE-IUSETTS- MINE CAR COMPRESSOR Application filed. September 19; 1928. Serial No. 306,953.

This invention relates to mine car compressors.

One object of the invention is to provide an improved portable compressor mechanism particularly adapted for mines. It is especially desirable that a mine car compressor be capable of being moved about the mine in spite of the limited head room and the narrow passages often encountered. It is accordingly a further object of my invention to provide an improved arrangement of the parts of the compressor whereby a low and compact outfit is obtained. ,A further object of my invention is to provide reduction gearing between the motor and the compressor so that the motor may run at high speed. A still further object of my invention is to provide an improved cooling system for circulating a cooling medium through jackets surrounding the compressor cylinders. Other objects and advantages will be apparent from the following description of one embodiment of my invention. which is disclosed in the accompanying drawings. I In these drawings,

Fig. 1 is a plan view of the" assembled mine I car compressor. T

Fig. 2 is a side elevation with parts broken away to show details of the mechanism.

Fig. 3 is a fragmentary view, partly in horizontal section, of a detail of the driving connections between the compressor and its driving motor.

By comparing that the electric driving motor 3 is of special design, so that the height is much less than the width. v This motor 3 is disposed toward the front of the mine car or truck 14, and subto either side of the motor 3. The comprossor, generally indicated by the numeral 5, is disposed to the rear of themotor 3, and is 1;; furnished with a crank case 6, and the usual cylinders and pistons. From the compressor cylinders. the air or other fluid which is being compressed is delivered by a pipe 7 through a connection 11 to thereceivers l, 4:. Free communication is established between the re- Figs. 1 and 2 it will be seen stantially midway between the sides of the value. A pair of receivers are disposedone I ceivers 4, 4 both by means of the connection 11 and by means of the furthertconection 12.

is provided which is in place in Fig. 1 but has been removed inFig. 2. A brake lever 13 is provided to hold the compressor stationary, or to slowdown the speed of travel of the same over the mine tracks. The motor 3 is stopped and started by means of the controller 9 disposed at the rear of the mine car. .The compressor cylinders v are jacketed, andacooling medium is forced through the same by means of a pump 15; From the pump the cooling medium passes through the connection 19 to the jackets of the compressor cylinders. A pipe 18 leads from the cooling jackets to the upper portion of'the radiator 17 A pipe 16 returns the cooling medium to the pump from the lowermost portion of the radiator 17. A drain 20 is provided so that the cooling medium may-be removed from the cooling system. The pump is alinedwith and connected so as to be driven directly by shaft 21 of the motor,

a coupling .22 beingprovided at the front end ofthe shaft 21 as shown in Fig. 2. I

. Betweenthe motor 3 and the compressoro is a set of speed reducing gears disposed within the casing'25. It will be notedtha't the shaft 21 of. the motor is offset from the crank shaft of the compressor disposed within the crank case 6. Due to this offset arrangement, a large reduction in speed maybe accomplished by gearing without requiring much formed integrally with the end plate of'the motor casing 26. The motor shaft rotates in bearings such, as the oneshown at 27 in Fig.3, and carries a pinion 28 which meshes with a-spur gear 29 keyed at 30 to ashort shaft 31. A flexible coupling 32 connects the shaft 31 with the crank shaft of the com .pressor. A ball bearing-"33, which is carried 7 space. As shown in Fig. 3, the casing 25 is by the casing 25, and a ball bearing 34 which is carried by the motor casing 26, are provided for rotatably supporting the shaft 31. It will thus be seen that the motor casing supports not only the motor shaft but also a shaft which forms part of the driving con nections between the motor and the compressor.

It is noteworthy that by disposing the re ceivers opposite the motor 3 and in front of the compressor 5, a very compact mine car compressor is obtained. The arrangement of the pump 15 at the forward end of the mine car makes it possible to connect the same directly to the shaft 21 of the motor and also to pump the cooling medium directly from the base of the radiator 17.

lVhile I have in this application speciiically described one form which my invention may assume in practice, it will be understood that this form of the same is shown for purposes of illustration and that the mvention may be modified and embodied in various other forms without departing from its spirit or the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is:

1. In a mine car compressor, a wheel mounted truck, a self-contained pumping unit including a motor and a compressor driven thereby mounted on said truck, and a pair of receivers for receiving fluidpumped by said compressor one disposed horizontally along each side of said truck in longitudinally overlapping relation with said pumping unit.

2. In a mine car compressor, a wheeled truck, a motor disposed longitudinally of said truck, a compressor carried by said truck and connected in driven relation with said motor, and apair of receivers for receiving fluid pumped by said compressor, said receivers being disposed one on each side of said motor and extending longitudinally thereof in longitudinally overlapping relation therewith.

3. In a mine car compressor, a wheel mounted truck carrying a compressor comprising a cylinder and a piston cooperatmg therewith so disposed that the piston reciprocates transversely of said truck, a motor carried by said truck and connected in driving relation with said piston, and a pair of receivers connected with said cylinder and horizontally disposed, one along each side of said truck, with the motor between them.

- 4. In a mine car compressor, a wheel mounted truck carrying a compressor comprising a cylinder and a piston cooperating therewith so disposed that the piston reciprocates transversely of said truck, a motor carried by said truck and connected in driving relation with said piston, a pair of'receivers connected with said cylinder andnorizontally disposed, one along each side of said truck, and connecting means placing said receivers in free communication with each other disposed substantiallv in a plane tangent to said receivers.

5. In combination, a wheel mounted truck carrying a compressor provided with cooling jackets, a closed system for the fluid employed in cooling said compressor comprising a radiator disposed at one end of said truck and a pump for circulating such fluid through said svstem, and a motor comprising a drive shaft disposed intermediate said compressor and pump, said compressor being connected in driving relation with one end of said shaft and said pump being alined with and directly connected to the opposite end of said shaft.

6. In combination, a wheel mounted truck carrying a compressor comprising a jacketed cylinder and a piston cooperating therewith, said cylinder and piston being so disposed that the piston reciprocates transversely of said truck, a motor comprising a drive shaft, and a closed system for the cooling fluid employed in cooling said compressor comprising a radiator disposed at one end of said truck, a pump connected on the one hand to said radiator and on the other hand with the jackets of said cylinder, and a connection between the jackets of said cylinder and said radiator, said compressor being connected in driving relation with one end of said shaft and said pump being alined with and directly connected to the opposite end of said shaft.

7 In a mine car compressor, a wheel mounted truck carrying a compressor comprising a cylinder and a iston cooperating therewith so disposed that the piston reciprocates transversely of said truck, a motor carried by said truck with its power shaft extending longitudinally of the latter and connected in driving relation with said piston, and a pair of receivers connected with said cylinder and horizontally disposed, one along each side of said truck in close adjacency to said compressor.

In testimony whereof I affix my signature.

FRED D. HOLDSWORTH. 

